Robot-assisted needle placement in open MRI: system architecture, integration and validation.

Area of Science:

• Medical Imaging
• Robotics
• Oncology

Background:

• Prostate cancer treatment increasingly requires targeted interventions.
• Precise needle placement for biopsy and therapy necessitates advanced image-guided methods.
• Traditional methods have limitations in accuracy and flexibility.

Purpose of the Study:

• To describe an integrated system for robotic-assisted, MRI-guided percutaneous procedures.
• To enable precise needle trajectory planning and execution.
• To overcome limitations of conventional fixed needle templates.

Main Methods:

• Development of a graphical planning interface for specifying needle trajectories.
• Utilizing registered pre-operative and intra-procedural MR images for planning.
• Employing an MRI-compatible robotic manipulator for accurate needle guide positioning.
• Automatic alignment of real-time intra-operative MR images for needle visualization.

Main Results:

• Successful planning and execution of percutaneous procedures with robotic assistance under MRI guidance.
• Demonstrated accurate positioning of needle guides based on computed image-space coordinates.
• Phantom experiments confirmed the system's feasibility and performance.
• Enhanced visualization of needle insertion through automatic alignment of intra-operative images.

Conclusions:

• The described integrated system offers a precise and flexible solution for MRI-guided percutaneous interventions.
• Robotic assistance and advanced imaging integration improve needle placement accuracy in prostate cancer treatment.
• This technology has the potential to enhance targeted biopsy and therapy delivery.